CN201450037U - Lithium-ion battery explosion-proof device - Google Patents
Lithium-ion battery explosion-proof device Download PDFInfo
- Publication number
- CN201450037U CN201450037U CN2009200611141U CN200920061114U CN201450037U CN 201450037 U CN201450037 U CN 201450037U CN 2009200611141 U CN2009200611141 U CN 2009200611141U CN 200920061114 U CN200920061114 U CN 200920061114U CN 201450037 U CN201450037 U CN 201450037U
- Authority
- CN
- China
- Prior art keywords
- ion battery
- lithium ion
- conductive plate
- proof device
- burst disk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 66
- 239000011148 porous material Substances 0.000 claims abstract description 8
- 239000000758 substrate Substances 0.000 claims description 13
- 230000007704 transition Effects 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/308—Detachable arrangements, e.g. detachable vent plugs or plug systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a lithium-ion battery explosion-proof device, which comprises a top cover, an explosion-proof sheet, an electrically-conductive board and an insulation washer, wherein the top cover is electrically connected with the electrically-conductive board through the explosion-proof sheet, and the area beyond the electric connection points of the electrically-conductive board is isolated and insulated from the explosion-proof sheet through the insulation washer. The top cover is provided with a central vent pores and a plurality of satellite holes surrounding the central vent pore. Compared with the prior art, the top cover is provided with the central vent pore and the satellite holes, the phenomenon that the gas inside the lithium-ion battery cannot be discharged for the explosion-proof sheet blocks the vent pore of the top cover can be effectively prevented, and the safety performance of the lithium-ion battery can be improved.
Description
Technical field
The utility model relates to a kind of lithium ion battery explosion-proof device, especially a kind of lithium ion battery explosion-proof device with good safety energy.
Background technology
Along with development of modern science and technology, mobile devices such as increasing electronic equipment, especially video camera, notebook computer, portable DVD player and digital camera have all had application more and more widely.Therefore these equipment have portable characteristics mostly, need be power supply with the battery all, and high-energy battery preferably, as lithium ion battery etc.
Though high-energy battery can be at any time for electronic equipment provides energy source,, owing to reasons such as the use of high-energy chemistry material and concentration of energy, the security performance of high-energy battery can not get satisfactory solution always.For example, lithium ion battery is short-circuited owing to being squeezed, colliding or running into other fortuitous events through regular meeting in charging, discharge or use.During short circuit, lithium ion battery can produce very big electric current and produce a large amount of heats, and the accumulation of heat may cause battery that burning even blast take place, and works the mischief for electronic equipment and user thereof.
In order to solve this technical problem, all be provided with on the top cover of a lot of lithium ion batteries of the prior art and be used to prevent the explosion-protection equipment that explodes, the lithium ion battery explosion-proof device generally comprises a top cover, a burst disk, an insulating washer and a conductive plate, wherein, burst disk caves in to the direction of conductive plate, and is electrically connected by solder joint with conductive plate at the middle part.When lithium ion battery overcharges or during short circuit, expanding gas in the battery container can pass from the air-vent that conductive plate is provided with, burst disk exerted pressure makes it distortion, with disconnections that be electrically connected between conductive plate and the burst disk, thereby lithium ion battery is opened circuit and stops intensification; If the pressure that gas expands is excessive, when being deformed to a certain degree, burst disk can disconnect, and gas can be discharged, to guarantee that lithium ion battery does not catch fire or explodes from the air-vent of top cover.
But, a lot of lithium ion battery, especially rectangular lithium ion batteries, only the center position of corresponding burst disk is offered an air-vent on top cover.When burst disk distortion disconnected, the air-vent of top cover was blocked at its middle part to the distortion of top cover direction possibly under the gas pressure effect, so that gas can't discharge from lithium ion battery, and and then caused and catch fire or danger such as blast.
In view of this, necessaryly provide a kind of lithium ion battery explosion-proof device with good explosion-proof performance.
The utility model content
The purpose of this utility model is: a kind of lithium ion battery explosion-proof device with good explosion-proof performance is provided.
In order to solve the problems of the technologies described above, the utility model provides a kind of lithium ion battery explosion-proof device, it comprises a top cover, a burst disk, a conductive plate and an insulating washer, top cover and conductive plate are electrically connected by burst disk, insulating washer is isolated zone beyond the conductive plate electric connection point and burst disk and is insulated, and offers a center air-vent and some satellite holes that centers on the center air-vent on the top cover.
As a kind of improvement of the utility model lithium ion battery explosion-proof device, described satellite hole is at least 4.
As a kind of improvement of the utility model lithium ion battery explosion-proof device, described conductive plate is a step, comprises fixed part, the transition part from the downward-sloping extension in interior ring edge of fixed part of an annular, and a lamellar body that is connected in the transition part bottom.
A kind of improvement as the utility model lithium ion battery explosion-proof device, the very little disconnection portion of thickness is set on the lamellar body of described conductive plate, described burst disk comprises that the substrate and of an annular encircles the variant part of edge to lower recess in substrate, and the disconnection portion of the variant part of burst disk and conductive plate is electrically connected.
As a kind of improvement of the utility model lithium ion battery explosion-proof device, the disconnection portion of the variant part of described burst disk and conductive plate is electrically connected with welding or riveted joint mode.
As a kind of improvement of the utility model lithium ion battery explosion-proof device, described insulating washer is interval between the substrate of the fixed part of conductive plate and burst disk.
A kind of improvement as the utility model lithium ion battery explosion-proof device, described insulating washer comprises last annular gasket parallel to each other and following annular gasket, and vertical brace of circumferential that is connected between annular gasket and the following annular gasket, the fixed part of conductive plate is contained between the last annular gasket of insulating washer and the following annular gasket and fixes, and one of them pad of insulating washer is held between the substrate of its fixed part and burst disk.
As a kind of improvement of the utility model lithium ion battery explosion-proof device, offer at least one pore on the lamellar body of described conductive plate.
As a kind of improvement of the utility model lithium ion battery explosion-proof device, the one side that described top cover is electrically connected with burst disk is offered a short slot, and short slot is connected with center air-vent and satellite hole.
As a kind of improvement of the utility model lithium ion battery explosion-proof device, described short slot is circular, and its edge is the circumcircle in satellite hole.
With respect to prior art, the utility model has prevented effectively that by offer a center air-vent and some satellites hole on top cover blocking the top cover air-vent because of burst disk causes the phenomenon that gas can't be discharged in the battery, has improved the security performance of lithium ion battery.
In addition, the utility model is by being provided with the transition part of step on conductive plate, reduced insulating washer and be subjected to the influence of thermal softening the burst disk distortion, the assurance burst disk can be out of shape rapidly when the lithium-ion electric pool gas expands the circuit disconnection, has further improved the security performance of lithium ion battery.
Description of drawings
Below in conjunction with the drawings and specific embodiments, the utility model lithium ion battery explosion-proof device and useful technique effect thereof are elaborated, wherein:
Fig. 1 is the perspective exploded view of the lithium ion battery of use the utility model lithium ion battery explosion-proof device, and wherein, lithium-ion electric core is not shown.
Fig. 2 is the cross-sectional schematic after the lithium ion battery assembling shown in Figure 1.
Fig. 3 is the schematic top plan view after the lithium ion battery assembling shown in Figure 1.
Embodiment
See also Fig. 1 to shown in Figure 3, use the lithium ion battery of the utility model lithium ion battery explosion-proof device to comprise: the combination cover cap that a housing 30, is connected on the housing 30, and one be contained in lithium-ion electric core in the housing 30 (figure does not show), wherein, combination cover cap comprises the utility model lithium ion battery explosion-proof device and electrode ejector.
The lithium ion battery explosion-proof device comprises a top cover 10, a burst disk 14, a conductive plate 15 and an insulating washer 16.
During installation, the variant part 142 of burst disk 14 is aimed at the short slot 107 of top covers 10, and the substrate 140 of burst disk 14 is connected in by laser welding on the bottom surface of top cover 10, at this moment, the center of burst disk 14 is over against the center air-vent 103 of top cover 10.The fixed part 150 of conductive plate 15 is contained in the insulating washer 16, and the disconnection portion 156 of conductive plate 15 is fixed in variant part 142 centers of burst disk 14 by welding, riveted joint or other modes.At this moment, the annular gasket 162 of insulating washer 16 is resisted against on substrate 140 lower surfaces of burst disk 14.Compare with the plane conductive plate that does not have step, the step of the conductive plate 15 in the illustrated embodiment can make the fixed part 150 of conductive plate 15 and the interval of top cover 10 reduce, thereby makes the thickness minimum of the annular gasket 162 of insulating case 16.
The electrode ejector comprises that one is opened in perforation 101, an insulating part 11, an electrode column 12 and the conducting strip 13 on the top cover 10.The electrode column 12 approximate T-shapes that are, its end face 120 is circular, after the perforation 101 of top cover 10 is passed by post portion 122, is electrically connected with conducting strip 13.Insulating part 11 is with electrode column 12 and conducting strip 13 and top cover 10 spacer insulator.
During assembling, lithium-ion electric core is packed in the housing 30, the welding circle 40 that combination cover cap is formed by laser welding is installed on the top of housing 30 again.In mounted lithium ion battery, a lug of lithium-ion electric core is connected with conductive plate 15, and is electrically connected to top cover 10 by burst disk 14.Another lug of lithium-ion electric core then is electrically connected to electrode column 12 by conducting strip 13.During use, top cover 10 is connected with external circuit as the two poles of the earth of lithium ion battery respectively with electrode column 12.
When lithium ion battery causes internal temperature to raise because of short circuit in charging or use, the gas of expansion will enter the space between conductive plate 15 and the burst disk 14 from the pore 158 of conductive plate 15.When the pressure of gas reaches certain numerical value, the variant part 142 of burst disk 14 will be pushed upwards distortion, because the thickness of insulating washer 16 is very little, therefore it is subjected to thermal softening also very little to the influence of burst disk 14 distortion, the variant part 142 of burst disk 14 can be rapidly broken the disconnection portion 156 of conductive plate 15 or the tie point between burst disk 14 and the conductive plate 15 (as solder joint etc.), thereby the lithium ion battery circuit is opened circuit and stops to heat up; If the bulbs of pressure of gas are excessive, when burst disk 14 upwards is deformed to a certain degree can weakness (as, ad hoc two-way or individual event indentation etc.) disconnect, owing to be provided with at least 4 satellite holes 105 on the top cover 10, even therefore the burst disk 14 that disconnects has been blocked center air-vent 103 or certain satellite hole 105, discharge the satellite hole 105 that gas in the lithium ion battery can not be plugged from top cover 10 yet, thereby guarantee that lithium ion battery does not catch fire or explodes.
By above description as can be known, by on top cover 10, offering center air-vent 103 and satellite hole 105, effectively prevented to block the phenomenon that the top cover air-vent causes the lithium-ion electric pool gas to discharge because of burst disk 14. in addition, by the transition part 152 of step is set on conductive plate 15, reduced insulating washer 16 and be subjected to the influence of thermal softening burst disk 14 distortion, assurance burst disk 14 can be out of shape rapidly the battery circuit disconnection when gas expands in battery, has further improved the security performance of lithium ion battery.
Need to prove that according to other execution modes of the present utility model, the electrode ejector can also be located at the bottom surface of housing,, repeat no more herein because its component structure and assembling mode etc. are all similar with illustrated embodiment.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also carry out suitable change and modification to above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the utility model is not limited to also should fall in the protection range of claim of the present utility model modifications and changes more of the present utility model.In addition, although used some specific terms in this specification, these terms do not constitute any restriction to the utility model just for convenience of description.
Claims (10)
1. lithium ion battery explosion-proof device, it comprises a top cover, a burst disk, a conductive plate and an insulating washer, top cover and conductive plate are electrically connected by burst disk, insulating washer is isolated zone beyond the conductive plate electric connection point and burst disk and is insulated, and it is characterized in that: offer a center air-vent and some satellite holes that centers on the center air-vent on the described top cover.
2. lithium ion battery explosion-proof device according to claim 1 is characterized in that: described satellite hole is at least 4.
3. lithium ion battery explosion-proof device according to claim 1 and 2, it is characterized in that: described conductive plate is a step, it comprises fixed part, the transition part from the downward-sloping extension in interior ring edge of fixed part of an annular, and a lamellar body that is connected in the transition part bottom.
4. lithium ion battery explosion-proof device according to claim 3, it is characterized in that: the very little disconnection portion of thickness is set on the lamellar body of described conductive plate, described burst disk comprises that the substrate and of an annular encircles the variant part of edge to lower recess in substrate, and the disconnection portion of the variant part of burst disk and conductive plate is electrically connected.
5. lithium ion battery explosion-proof device according to claim 4 is characterized in that: the disconnection portion of the variant part of described burst disk and conductive plate is electrically connected with welding or riveted joint mode.
6. lithium ion battery explosion-proof device according to claim 4 is characterized in that: described insulating washer is interval between the substrate of the fixed part of conductive plate and burst disk.
7. lithium ion battery explosion-proof device according to claim 6, it is characterized in that: described insulating washer comprises last annular gasket parallel to each other and following annular gasket, and vertical brace of circumferential that is connected in up and down between two annular gaskets, the fixed part of described conductive plate is contained between the last annular gasket of insulating washer and the following annular gasket and fixes, and one of them pad of insulating washer is held between the substrate of its fixed part and burst disk.
8. lithium ion battery explosion-proof device according to claim 3 is characterized in that: offer at least one pore on the lamellar body of described conductive plate.
9. lithium ion battery explosion-proof device according to claim 1 and 2 is characterized in that: the one side that described top cover is electrically connected with burst disk is offered a short slot, and short slot is connected with described center air-vent and satellite hole.
10. lithium ion battery explosion-proof device according to claim 9 is characterized in that: described short slot is for circular, and its edge is the circumcircle in satellite hole.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200611141U CN201450037U (en) | 2009-07-24 | 2009-07-24 | Lithium-ion battery explosion-proof device |
| US12/842,016 US8404372B2 (en) | 2009-07-24 | 2010-07-22 | Safety device for use in a lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200611141U CN201450037U (en) | 2009-07-24 | 2009-07-24 | Lithium-ion battery explosion-proof device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201450037U true CN201450037U (en) | 2010-05-05 |
Family
ID=42554759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200611141U Expired - Lifetime CN201450037U (en) | 2009-07-24 | 2009-07-24 | Lithium-ion battery explosion-proof device |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US8404372B2 (en) |
| CN (1) | CN201450037U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105870366A (en) * | 2016-06-07 | 2016-08-17 | 宁德时代新能源科技股份有限公司 | Power battery top cap and power battery |
| CN106455823A (en) * | 2014-06-27 | 2017-02-22 | 歌乐株式会社 | Head rest device |
| CN109920959A (en) * | 2017-12-13 | 2019-06-21 | 比亚迪股份有限公司 | Current interrupt device and its flip piece, battery cover board assembly, single battery, battery modules, power battery and electric car |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9947908B2 (en) | 2013-07-25 | 2018-04-17 | Johnson Controls Technology Company | Vent housing for advanced batteries |
| CN207800740U (en) * | 2018-02-07 | 2018-08-31 | 宁德时代新能源科技股份有限公司 | Battery modules |
| CN110277533B (en) * | 2018-03-16 | 2020-12-29 | 宁德时代新能源科技股份有限公司 | Battery module |
| US11374284B2 (en) * | 2019-12-13 | 2022-06-28 | Proterra Operating Company, Inc. | Battery vent system |
| KR20220037195A (en) * | 2020-09-17 | 2022-03-24 | 에스케이온 주식회사 | Battery Pack |
| EP3996191A1 (en) * | 2020-11-06 | 2022-05-11 | tmax Holding GmbH | Valve for pressure compensation and / or dissipation of pressure overload |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7258940B2 (en) * | 2005-12-05 | 2007-08-21 | The Gillette Company | Zinc/air cell |
| KR100878701B1 (en) * | 2006-03-13 | 2009-01-14 | 주식회사 엘지화학 | High Rate Charging and Discharging Cylindrical Secondary Battery |
| KR101308215B1 (en) * | 2007-08-30 | 2013-09-13 | 삼성에스디아이 주식회사 | Cylinder type secondary battery |
| KR100954588B1 (en) * | 2007-12-07 | 2010-04-26 | 삼성에스디아이 주식회사 | Cap Assembly and Secondary Battery having the same |
-
2009
- 2009-07-24 CN CN2009200611141U patent/CN201450037U/en not_active Expired - Lifetime
-
2010
- 2010-07-22 US US12/842,016 patent/US8404372B2/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106455823A (en) * | 2014-06-27 | 2017-02-22 | 歌乐株式会社 | Head rest device |
| CN106455823B (en) * | 2014-06-27 | 2019-11-08 | 歌乐株式会社 | Head rest device |
| CN105870366A (en) * | 2016-06-07 | 2016-08-17 | 宁德时代新能源科技股份有限公司 | Power battery top cap and power battery |
| CN105870366B (en) * | 2016-06-07 | 2019-03-15 | 宁德时代新能源科技股份有限公司 | Power battery top cap and power battery |
| US10418619B2 (en) | 2016-06-07 | 2019-09-17 | Contemporary Amperex Technology Co., Limited | Top cover of power battery and power battery |
| CN109920959A (en) * | 2017-12-13 | 2019-06-21 | 比亚迪股份有限公司 | Current interrupt device and its flip piece, battery cover board assembly, single battery, battery modules, power battery and electric car |
Also Published As
| Publication number | Publication date |
|---|---|
| US20110020675A1 (en) | 2011-01-27 |
| US8404372B2 (en) | 2013-03-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100505 |
|
| CX01 | Expiry of patent term |